Why do SQL FullText queries slow down when you OR?

Question

In SQL Server (2008), I have a FullText index on two columns, call them Table1.FirstNames and Table2.LastNames. After profiling some queries, I came u

Answer 1

I'd take a look at the execution plan for each of those. I'm guessing you will learn quite a bit from that.

Here is a decent link that will show you how to display the execution plan as well as some tips on interpreting it.